Ever wanted to find out which program uses that strange udp or tcp port ? - Multi-OS Shareware $26.
Did you ever wonder what program uses that strange port that suddenly appears in netstat ? Then Advanced Netstat is what you need ! Many trojans,backdoors,viruses and worms open ports on your system to allow an attacker to access your system and remotely control it.

Advanced Netstat 1.0.5 7-Apr-06 Multilingual 2.2 MB

Advanced Netstat helps you to spot such applications. It shows you exactly which applications listen on the network for connections. It is the perfect tool for Administrators but also for private individuals.